37 results about "Superconducting quantum computing" patented technology

The application discloses a superconducting quantum computing chip based on a corrosion-resistant Josephson junction and a preparation method thereof. The superconducting quantum computing chip comprises a substrate, a plurality of superconducting quantum bits arranged periodically on a first surface of the substrate, each of the superconducting quantum bits comprising two capacitive electrodes and a Josephson junction connecting the two capacitive electrodes, and a protective layer on a surface of the Josephson junction.

The invention provides a method for executing a dynamic quantum circuit on a superconducting quantum computing device, a superconducting quantum computing system and a computer readable storage medium, and the method comprises the following steps: dividing the dynamic quantum circuit into at least one main circuit and at least one control sub-circuit, the main circuit is a circuit which is not influenced by a measurement result in the dynamic quantum circuit during execution, and the control sub-circuit is a circuit which is controlled by depending on the measurement result in the dynamic quantum circuit during execution; and respectively carrying out routing compiling on the at least one main line and the at least one control sub-line so as to sequentially execute the at least one main line after routing compiling and the control sub-line which is determined to be required to be executed after routing compiling on the superconducting quantum computing equipment according to the execution time sequence of the dynamic quantum line.

This invention discloses a method for controlling the thermal relaxation path of superconducting nanostructures and its application. This method utilizes a van der Waals integration strategy to sequentially fabricate a molybdenum disulfide layer on a silicon / silicon oxide substrate using chemical solution deposition and a niobium nitride superconducting layer using magnetron sputtering, constructing a niobium nitride / molybdenum disulfide heterostructure with intrinsic anisotropic thermal conductivity. Superconducting nanodevices with specific geometric configurations are designed for this heterostructure. Leveraging the ultra-high in-plane thermal conductivity of molybdenum disulfide and its suppressed out-of-plane heat transfer characteristics, the method achieves directional control of the internal thermal relaxation path of the superconducting nanostructure, verifying its dual advantages of optimizing thermal management and enhancing superconducting performance. The control method of this invention is mature and controllable, effectively transforming disordered thermal relaxation into directional heat transfer, significantly improving the thermal stability and integration density of superconducting devices, and providing a core solution for the thermal management of nanocircuits in fields such as superconducting quantum computing and high-sensitivity quantum detection.

A Josephson parametric amplifier packaging module, relating to the technical field of quantum computing. The Josephson parametric amplifier packaging module comprises a substrate (1), a magnetic shield (2), a circulator (3) and a Josephson parametric amplifier (4). The magnetic shield (2) is fixed on the substrate (1), and the magnetic shield (2) comprises a first cavity (201) and a second cavity (202). The circulator (3) and the Josephson parametric amplifier (4) are respectively located in the first cavity (201) and the second cavity (202), the circulator (3) comprises a first port (31), a second port (32) and a third port (33), and the Josephson parametric amplifier (4) comprises a signal port (41) and a pump port (42). The second port (32) is coupled to the signal port (41) by means of a connector (5), and the first port (31), the third port (33) and the pump port (42) extend to the exterior of the magnetic shield (2).

The invention provides a multi-quantum-bit control system and method, and relates to the technical field of superconducting quantum computing. The multi-quantum bit control system comprises a first common microwave transmission line and a quantum bit measurement and control unit. The quantum bit measurement and control unit comprises a superconducting quantum bit; the quantum bit driving cavity applies a driving microwave pulse for near resonance with the superconducting quantum bit to the quantum bit driving cavity through a first common microwave transmission line, and the frequency of the driving microwave pulse is matched with the resonant frequency of the quantum bit driving cavity, so that the quantum bit driving cavity generates near resonance, and the superconducting quantum bit is driven. Performing a single quantum bit gate operation on the superconducting quantum bits; and the quantum bit magnetic flux bias circuit is in coupled connection with the superconducting quantum bit and is used for applying a first bias pulse signal to the superconducting quantum bit so as to adjust the quantum bit frequency of the superconducting quantum bit, so that the superconducting quantum bit and the quantum bit driving cavity are in near resonance.

The embodiment of the invention discloses a quantum circuit and a quantum computer applied to a QAOA algorithm, and relates to the technical field of quantum computing, and by setting a plurality of controlled NOT gates, any quantum bit can be used as a control bit of the controlled NOT gate and can also be used as a controlled bit of the controlled NOT gate, so that the quantum circuit and the quantum computer can be applied to the QAOA algorithm. The information interaction of any quantum bit in the plurality of quantum bits can be conveniently realized. Due to the arrangement mode, when the QAOA algorithm is used for solving the dense QUBO problem, a logic gate needed in an adopted quantum circuit is only a neighbor double-quantum logic gate, and the overall circuit design is matched with a chained chip structure, so that implementation on the superconductive quantum calculation chip level at the present stage is facilitated, and the method has important significance on application and development of quantum calculation.

The invention relates to the technical field of quantum information, and discloses an integrated superconducting quantum bit radio frequency module, which comprises a distribution board card, a merging board card, a reading board card and a case shell, and is characterized in that the distribution board card and the merging board card are connected and fixed through an inter-board radio frequency connector; the assembling number of the combination board cards is determined by the final distribution number of the distribution board card power division circuit, an IQ signal of an IQ combiner in the distribution board card is connected to the board connection vertical paste connector after passing through the Gaussian filter circuit, and other signals, except the IQ signal, of the IQ combiner in the distribution board card are connected in and out from the side paste radio frequency connector; the function structure of the reading board card is similar to that of the distribution board card, and the reading board card is used for controlling a reading circuit of the superconducting quantum computing chip.

The invention provides a layout design rule checking method and device, electronic equipment and a storage medium, and relates to the technical field of computers. The layout design rule checking method comprises the following steps: receiving a natural language text which is input by a user and is used for describing a layout design rule checking requirement; performing natural language processing on the natural language text, and extracting key rule information corresponding to the layout design rule inspection requirement; on the basis of the key rule information, calling a generative artificial intelligence model to generate a domain specific language DSL code conforming to layout design rule inspection of the superconducting quantum computing chip; converting the DSL code into a rule checking script which can be executed by a layout design tool; and executing the rule checking script to obtain a checking result of the layout design rule. Therefore, the development difficulty of the layout design rule check code in the superconducting quantum computing chip design is remarkably reduced, and the complexity and the error-prone property of traditional manual script writing are avoided.

The application provides a decoherence time improving method based on mutual inductance adjustment and junction asymmetry compensation, and belongs to the technical field of superconducting quantum computation. The method comprises the following steps: constructing a superconducting quantum bit theoretical model comprising a non-equilibrium mutual inductance and a non-symmetrical Josephson junction; determining the core basic parameters and constraint conditions of the double-junction superconducting quantum bit, deducing a mutual inductance balance compensation condition, adjusting a magnetic flux line ground position, changing the numerical relationship of mutual inductances of left and right arms, and eliminating the relaxation caused by mutual inductance imbalance; defining a junction asymmetry parameter and a mutual inductance imbalance degree, deducing a relaxation compensation condition, making the relaxation caused by mutual inductance imbalance and the relaxation caused by junction asymmetry cancel each other out, and improving the decoherence time of the superconducting quantum bit. The application establishes a quantitative relationship between mutual inductance adjustment and junction asymmetry compensation, realizes relaxation cancellation by using the interaction between mutual inductance imbalance and junction asymmetry, and significantly improves the decoherence time and gate fidelity of the quantum bit.

The invention provides a low-noise arbitrary waveform generation device and method for superconducting quantum computing, which adopts a hardware architecture in which a bottom plate integrated with a medium-speed waveform generation circuit is combined with a high-speed daughter card, so that the expansibility and the application range of the device are improved; the radio frequency direct acquisition circuit design is applied to the high-speed daughter card, and the unique power management module and the device overall ground plane configuration scheme and other innovative noise suppression technologies are introduced into the bottom plate, so that the system noise is remarkably reduced, and the signal-to-noise ratio and the measurement precision of signals are improved.

The invention discloses a superconducting quantum computing chip and a preparation method thereof. And a first-class thermometer is arranged in the superconducting quantum computing chip. According to the application, the first type thermometer is prepared near the superconducting quantum bit through the superconducting quantum computing chip technology, and the temperature fluctuation of the corresponding bit area can be monitored in situ in real time, so that the real-time change of the temperature distribution on the whole chip is obtained, and a core technical support is provided for the thermal management of a large-scale quantum processor.

Disclosed in the present invention are a rapid initialization method and system for a qubit and a superconducting quantum computer. The method comprises: calibrating the frequency of a readout cavity for a qubit, frequencies of excited states, a Rabi oscillation between a ground state and a first excited state, and a Rabi oscillation between the excited states; calibrating transverse field driving frequencies of dressed states and transverse field driving frequencies of the excited states; measuring quantum state evolution probabilities under different transverse field driving amplitudes, and determining transverse field driving parameters with the fastest initialization rate; and applying the transverse field driving parameters to corresponding channels to implement rapid initialization of the qubit. The system comprises a waveform generator module, a combiner module, a quantum carrier module and a readout display module. The superconducting quantum computer comprises the system and executes the method. The present disclosure can quickly change the equivalent coupling strength between the qubit and a resonant cavity, and uses the extremely high photon dissipation rate of the resonant cavity to build a rapid dissipation channel, thereby implementing rapid initialization of a Fluxonium qubit.

The invention discloses a superconducting frequency mixing device, a preparation method and a superconducting quantum computer, and relates to the technical field of electronics. In the application, the superconducting frequency mixing device comprises a first port, a second port, a third port, a first filter network, a second filter network and a parametric impedance converter, and the parametric impedance converter comprises at least one Josephson junction. Wherein the first port used for receiving microwave signals is connected with the input end of the first filter network, the second port used for receiving local oscillator signals is connected with one input end of the parametric impedance converter, and the other input end of the parametric impedance converter is connected with the output end of the first filter network. Therefore, the first port and the second port are isolated through the first filter network, that is, the microwave signal and the local oscillator signal are isolated through the filter network, the signal isolation degree is improved, and the frequency mixing effect is improved.

The invention provides a superconducting quantum computing room temperature amplifier which is applied to the technical field of quantum bit amplification and reading. According to the amplifier, a kovar metal cavity comprises a plurality of radio frequency isolation cavities which are isolated from one another through partition walls and are electrically connected through radio frequency transmission glass beads sintered in the partition walls; the power supply isolation cavity and the plurality of radio frequency isolation cavities are mutually spatially and electromagnetically isolated in the vertical direction, and the power supply isolation cavity and the plurality of radio frequency isolation cavities are electrically connected through a plurality of sintered power supply transmission glass beads in the vertical direction; the multi-stage radio frequency amplification circuit performs multi-stage amplification processing on the radio frequency signal and outputs a target radio frequency signal; the double-layer power supply device and circuit comprises a four-layer PCB and double-face power supply devices, the periphery of the four-layer PCB is grounded, wrapped with gold, welded, suspended and fixed to the inner side wall of the power supply isolation cavity, and the double-face power supply devices are distributed on the upper side and the lower side of the four-layer PCB. And a plurality of power supply transmission glass beads penetrating through the four layers of PCBs and the bottoms of the plurality of radio frequency isolation cavities are sintered to supply power to the multi-stage radio frequency amplification circuit.

The application discloses a superconducting quantum computer mainboard, which integrates a control multiplexer, a quantum amplifier and a superconducting quantum processor on the same circuit board, provides a novel channel multiplexing mode for controlling and reading out quantum bits, greatly reduces the number of microwave lines, realizes control and reading out of more quantum bits, and is beneficial to large-scale development of the superconducting quantum computer.

A device includes: a substrate; a first superconductor layer on the substrate, the first superconductor layer having a first kinetic inductance; and a second superconductor layer on the first superconductor layer, the second superconductor layer having a second kinetic inductance that is lower than the first kinetic inductance, in which the second superconductor layer covers the first superconductor layer such that the second superconductor layer and the first superconductor layer have a same footprint, with the exception of at least a first region where the second superconductor layer is omitted so that the first superconductor layer and the second superconductor layer form a circuit element having a predetermined circuit parameter.

The invention discloses an electric power system operation state prediction and evaluation method and device based on superconducting quantum computing, and relates to the field of electric power systems, and the method comprises a collection and preprocessing module which is used for collecting the operation data of an electric power system, and carrying out the denoising and normalization preprocessing of the collected data, so as to generate a standard data set; the extraction module is used for receiving the standard data set, performing feature extraction and quantization conversion on the standard data set to obtain deep feature information hidden in the data set, and converting the deep feature information into a quantum feature vector to serve as input of the operation module; through a superconducting quantum computing technology, fine processing is carried out on operation data of a power system, noise interference is effectively suppressed, data distribution is standardized, associated features hidden in the data are deeply mined, operation is carried out by constructing a multi-dimensional quantum entanglement state, a mapping relation between the features and the operation state is accurately established, and the accuracy of the operation state of the power system is improved. And the accuracy of future state prediction is improved.

According to an embodiment of the present invention, a quantum processor includes a qubit chip. The qubit chip includes a substrate, and a plurality of qubits formed on a first surface of the substrate. The plurality of qubits are arranged in a pattern, wherein nearest-neighbor qubits in the pattern are connected. The quantum processor also includes a long-range connector configured to connect a first qubit of the plurality of qubits to a second qubit of the plurality of qubits, wherein the first and second qubits are separated by at least a third qubit in the pattern.

The application discloses a superconducting ring spacer and a preparation method thereof, which greatly simplifies a superconducting quantum test system, is beneficial to the large-scale development of a superconducting quantum computing circuit, and realizes compatibility with a superconducting integrated circuit in a preparation process, so that the superconducting quantum test system is greatly simplified, and the large-scale development of the superconducting quantum computing circuit is facilitated.

A voltage source, comprising a chassis (10), and a power supply module (20) and N PCB assemblies (30) that are provided in the chassis (10). Each PCB assembly (30) comprises a control module (31), a first isolation module (32), a second isolation module (33), a third-stage filtering module (34), and a DAC and amplifier module (35), wherein the power supply module (20) is sequentially connected to the first isolation module (32), the third-stage filtering module (34) and the DAC and amplifier module (35), the power supply module (20) receives an externally input mains voltage and converts same into a direct-current power source required by the PCB assembly (30), and the third-stage filtering module (34) filters the power resource on the PCB assembly (30); and the control module (31) is sequentially connected to the second isolation module (33) and the DAC and amplifier module (35), the control module (31) communicates with the outside and transmits a control signal to the DAC and amplifier module (35) by means of the second isolation module (33), and the DAC and amplifier module (35) outputs a voltage value on the basis of the control signal. Thus, both an output voltage range and precision stability meet the requirements of superconducting quantum computing, and large-scale deployment costs are reduced.

This invention belongs to the field of superconducting quantum computing technology and relates to a method for realizing a mixed-dimensional quantum phase gate in a superconducting quantum system. The system includes: a microwave cavity as a quantum resonator for carrying photons and encoding target qubits; a superconducting flux three-level qubit as a three-level quantum system used as control bits, coupled to the microwave cavity via a capacitor; and a classical microwave pulse source for applying a controllable microwave driving field to the superconducting flux three-level qubit. The method utilizes the dispersive coupling between the superconducting flux three-level qubit and the microwave cavity in the superconducting quantum system, combined with the controllable microwave driving field applied to the superconducting flux three-level qubit, to deterministically control the phase of the cavity field by the quantum state of the superconducting flux three-level qubit through a one-step evolution process. This invention has a 100% success rate and its operational reliability is far superior to probabilistic optical solutions.

The application discloses a multi-port frequency division multiplexing filter, comprising: one or more than one frequency selection filter module, each of which is provided with one input port and one or more than one output port; each of the frequency selection filter modules comprises one or more than one coupling module and one or more than one resonant cavity with different frequencies; the coupling module is used for coupling a frequency signal input through the input port to the resonant cavity with different frequencies; and the resonant cavity is used for completing selective transmission of the corresponding frequency signal and outputting from the corresponding output port. The embodiment of the application realizes the single-cavity band-pass filtering function of adjustable frequency bands. Not only can the problem of XY control line port multiplexing in the field of superconducting quantum computing be solved, but also the multi-section frequency division multiplexing function in other application fields can be realized, which has great significance for promoting the large-scale expansion of quantum processors.

Provided in the present invention are a superconductor-based coaxial cable of a dilution refrigerator, a dilution refrigerator, and a superconducting quantum computing device. The dilution refrigerator comprises at least a first temperature layer, a second temperature layer, a third temperature layer and a fourth temperature layer. The coaxial cable comprises a conductor layer, an insulating layer and a first shielding layer, the first shielding layer being arranged on the insulating layer at a first thickness. The coaxial cable further comprises a first coaxial cable segment disposed in the first temperature layer, a second coaxial cable segment disposed in the second temperature layer, a third coaxial cable segment disposed in the third temperature layer, and a fourth coaxial cable segment disposed in the fourth temperature layer, wherein the first thickness and the material of the parts of the first shielding layer at the first coaxial cable segment, the second coaxial cable segment, the third coaxial cable segment and the fourth coaxial cable segment are determined on the basis of a preset combination method.

The application discloses a superconducting quantum computing multifunctional control circuit, comprising an FPGA logic module, an LDO power module and a superconducting quantum computing chip which are sequentially kept in communication connection; the FPGA logic module comprises an AWG waveform memory, an AWG waveform playing controller, a bypass SFDR cancellation module and an RFSoC digital-to-analog conversion module which are sequentially connected in communication along a signal transmission direction, wherein an output end of the RFSoC digital-to-analog conversion module is arranged as an output end of the FPGA logic module; the FPGA logic module further comprises a clock synchronization module, and the clock synchronization module inputs a clock signal to the RFSoC digital-to-analog conversion module; the XY microwave pulse, the DC Pulse pulse and the DC Offset direct current voltage are unified to generate in the same FPGA and RFSoC architecture, the bypass SFDR cancellation module is arranged to generate a cancellation signal which is opposite in phase to a stray component, and the superconducting quantum computing multifunctional control circuit has the advantages of significantly reducing the main stray component in an output channel and improving the purity of an effective signal.

The application discloses a superconducting quantum chip processor folding bit processing method and process, relates to the field of superconducting quantum computation and micro-nano processing technology, and specifically comprises the following steps: S100, substrate pretreatment and SiO2 pattern initial engraving: selecting a 12-inch and below silicon, SiC and GaN wafer as a base, using an atomic force microscope and a stress tester to detect the substrate surface topography and stress initial value, the application realizes folding processing of superconducting quantum bits by introducing focused ion beam technology, greatly breaks through the limitations of traditional plane processing technology, and the traditional superconducting quantum bit processing method is mainly based on plane processing technology, and many challenges are faced when complex three-dimensional structures are processed, and the application accurately controls the stress distribution of the thin film by using the focused ion beam technology, realizes height-controllable deformation in a set direction, and thus easily realizes folding of the superconducting quantum bit.

The invention provides a de-coherence time increasing method based on mutual inductance adjustment and junction asymmetric compensation, and belongs to the technical field of superconducting quantum computing. The method comprises the following steps: constructing a superconducting quantum bit theoretical model containing unbalanced mutual inductance and an asymmetric Josephson junction; determining core basic parameters and constraint conditions of the double-junction superconducting quantum bit, deducing mutual inductance balance compensation conditions, adjusting a magnetic flux line grounding electric position, changing a numerical relationship of mutual inductance of a left arm and a right arm, and eliminating relaxation caused by mutual inductance imbalance; and defining a junction asymmetry parameter and a mutual inductance imbalance degree, and deducing a relaxation compensation condition, so that relaxation caused by the mutual inductance imbalance and relaxation caused by the junction asymmetry counteract each other, and the superconducting quantum bit decoherence time is improved. According to the invention, a quantitative relation between mutual inductance adjustment and junction asymmetry compensation is established, relaxation cancellation is realized by using interaction between mutual inductance imbalance and junction asymmetry, and the de-coherence time and gate fidelity of quantum bits are significantly improved.

The present disclosure provides a quantum signal processing method and device, equipment and storage medium, relates to the field of data processing, in particular to the technical field of quantum computing, superconducting quantum computing, quantum control and the like. The specific implementation scheme is: obtaining an initial spectrum line corresponding to each reference frequency based on a target amplitude and a target phase corresponding to each excitation frequency in a plurality of excitation frequencies, and a target amplitude and a target phase corresponding to each reference frequency in a plurality of reference frequencies; wherein the excitation frequency represents the frequency of the microwave pulse used to excite the quantum bit; the initial spectrum line corresponding to the reference frequency is used to represent the degree of change of the excitation state information of the quantum bit with the excitation frequency on the basis of the reference frequency; determining the signal-to-noise ratio of the initial spectrum line corresponding to each reference frequency; obtaining a target spectrum line whose signal-to-noise ratio meets a preset requirement based on the signal-to-noise ratio of the initial spectrum line corresponding to each reference frequency.

The utility model belongs to the technical field of superconducting quantum computers, and discloses a control panel structure and a superconducting quantum computer. The control panel structure comprises a supporting plate, a middle layer and an integrated plate. The middle layer is arranged above the supporting plate, and the middle layer is arranged as a circuit board dielectric layer. The middle layer is provided with a plurality of hole groups, each hole group comprises a conducting hole and a plurality of shielding holes which penetrate through the upper surface and the lower surface of the middle layer, the plurality of shielding holes are arranged around the periphery of the conducting hole, and the conducting hole and the shielding holes are connected with the supporting plate through a first bonding pad; the integrated board is arranged above the middle layer, and the integrated board is connected with the via holes and the shielding holes through first bonding pads. According to the control panel structure, the main body material of the middle layer is the circuit board material, so that the thickness of the middle layer can be conveniently regulated and controlled, and the mounting height can be adjusted according to requirements. The superconducting quantum computer comprises the control panel structure, and the supporting plate is used for loading a connected line (such as an optical fiber or a coaxial line).

The utility model discloses a kind of Josephson parametric amplifier based on full impedance matching, it is related to superconducting quantum computing technical field.Josephson parametric amplifier includes substrate and the impedance transformer, resonator, superconducting quantum interference device and pump line sequentially arranged on substrate;Resonator and superconducting quantum interference device constitute resonant circuit, and resonator and superconducting quantum interference device are respectively used to provide the impedance and nonlinear inductance required for resonance;Impedance transformer, resonator and pump line are coplanar waveguide, and resonator and impedance transformer jointly constitute impedance network, provide the impedance required for signal amplification to realize high bandwidth high gain parametric amplifier.The utility model uses coplanar waveguide to realize the impedance network of full impedance matching, simplifies the manufacturing process of parametric amplifier, improves the consistency of preparation amplifier.Simultaneously, the coplanar waveguide based on superconducting material reduces the loss in signal amplification process, improves the reading efficiency of quantum signal.

The application discloses a superconducting quantum control multiplexing device and a preparation method thereof. Embodiments of the application greatly simplify a superconducting quantum test system, are beneficial to the large-scale development of a superconducting quantum computing circuit, and realize compatibility with a superconducting integrated circuit in a preparation process.